Importance

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Abstract

Tertiary diamines having formula (I), wherein Ar is an aromatic group selected from: formula (n), where n=1 to 3; formula (m), where m=1 to 3; formula (p), where p=1 to 3, R.sup.1 is a group selected from alkyl, alkenyl, cycloalkyl, cycloalkenyl, carbocyclic aryl optionally substituted by at least one group selected from halo, alkyl, cyano, nitro and cycloalkyl and an aromatic heterocyclic group optionally substituted by at least one group selected from halo, cyano, nitro, alkyl, cycloalkyl and aryl optionally substituted by at least one halo group; R.sup.2 is a fused bicyclic or tricyclic aromatic heterocyclic group selected from formula (A) and formula (B), which heterocyclic group may, optionally, be substituted by at least one group selected from halo, cyano, nitro, alkyl, cycloalkyl and aryl optionally substituted by at least one halo and wherein Q is O, S or N--R.sup.5 where R.sup.5 is H, alkyl, cycloalkyl or aryl optionally substituted by at least one group selected from halo, alkyl, cyano or nitro. R.sup.3 is a group selected from alkyl, alkenyl, cycloalkyl, cycloalkenyl, carbocyclic aryl optionally substituted by at least one group selected from halo, alkyl, cyano, nitro and cycloalkyl, and an aromatic heterocyclic group optionally substituted by at least one group selected from halo, cyano, nitro, alkyl, cycloalkyl and aryl optionally substituted by at least one halo; and R.sup.4 is a group selected from carbocyclic aryl optionally substituted by at least one group selected from halo, cyano, nitro and alkyl, and aromatic heterocyclic optionally substituted by at least one group selected from halo, cyano, nitro, alkyl, aryl optionally substituted by at least one halo, and cycloalkyl are disclosed. These compounds are useful as light emitting materials, hole injection materials or hole transporting materials in organic light emitting devices, particularly having application in flat panel displays. 1

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First Claim